Speaker
Description
We investigate the static-quark entropy in QCD in the presence of external magnetic fields, using its temperature peak as a pseudocritical deconfinement indicator. Our calculations employ HISQ fermions with a tree-level improved Symanzik gauge action at physical quark masses, on lattices with temporal extents $N_\tau = 8, 12$ and fixed aspect ratio $N_\sigma/N_\tau = 4$. A two-dimensional $(T, eB)$ analysis allows us to determine $S_Q(T, eB)$, from which we extract $T_{pc}^{Q}(eB)$ and perform a continuum extrapolation.
In the weak-field region studied, $T_{pc}^{Q}(eB)$ exhibits a mild decrease, from $\sim 155$~MeV at $eB=0$ to $\sim 152$~MeV at $eB = 0.14\,\mathrm{GeV}^2$. We compare this deconfinement indicator with the total chiral susceptibility and the baryon-electric charge correlation $\chi^{BQ}_{11}$ to explore their distinct responses in the $T-eB$ plane.
| Parallel Session (for talks only) | QCD at nonzero temperature and density |
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